New function: for_each_rtx_in_insn

gcc/
2014-08-18  David Malcolm  <dmalcolm@redhat.com>

	* rtl.h (for_each_rtx_in_insn): New function.
	* rtlanal.c (for_each_rtx_in_insn): Likewise.

From-SVN: r214119

gcc/ChangeLog

 2014-08-18  David Malcolm  <dmalcolm@redhat.com>
 
+	* rtl.h (for_each_rtx_in_insn): New function.
+	* rtlanal.c (for_each_rtx_in_insn): Likewise.
+
+2014-08-18  David Malcolm  <dmalcolm@redhat.com>
+
 	* coretypes.h (class rtx_insn): Add forward declaration.
 
 	* rtl.h: Include is-a.h.

gcc/rtl.h

@@ -2399,6 +2399,7 @@ extern bool tls_referenced_p (rtx);
 
 typedef int (*rtx_function) (rtx *, void *);
 extern int for_each_rtx (rtx *, rtx_function, void *);
+extern int for_each_rtx_in_insn (rtx_insn **, rtx_function, void *);
 
 /* Callback for for_each_inc_dec, to process the autoinc operation OP
    within MEM that sets DEST to SRC + SRCOFF, or SRC if SRCOFF is

gcc/rtlanal.c

@@ -3011,6 +3011,22 @@ for_each_rtx (rtx *x, rtx_function f, void *data)
   return for_each_rtx_1 (*x, i, f, data);
 }
 
+/* Like "for_each_rtx", but for calling on an rtx_insn **.  */
+
+int
+for_each_rtx_in_insn (rtx_insn **insn, rtx_function f, void *data)
+{
+  rtx insn_as_rtx = *insn;
+  int result;
+
+  result = for_each_rtx (&insn_as_rtx, f, data);
+
+  if (insn_as_rtx != *insn)
+    *insn = safe_as_a <rtx_insn *> (insn_as_rtx);
+
+  return result;
+}
+
 
 
 /* Data structure that holds the internal state communicated between